diff --git a/src/renderer/App.vue b/src/renderer/App.vue
index 9fde7eb..f0438b2 100644
--- a/src/renderer/App.vue
+++ b/src/renderer/App.vue
@@ -125,6 +125,19 @@ onMounted(async () => {
   if (isLyricWindow.value) {
     return;
   }
+
+  // 检查网络状态，离线时自动跳转到本地音乐页面
+  if (!navigator.onLine) {
+    console.log('检测到无网络连接，跳转到本地音乐页面');
+    router.push('/local-music');
+  }
+
+  // 监听网络状态变化，断网时跳转到本地音乐页面
+  window.addEventListener('offline', () => {
+    console.log('网络连接断开，跳转到本地音乐页面');
+    router.push('/local-music');
+  });
+
   // 初始化 MusicHook，注入 playerStore
   initMusicHook(playerStore);
   // 初始化播放状态
diff --git a/src/renderer/hooks/MusicHook.ts b/src/renderer/hooks/MusicHook.ts
index 954005a..c0b4ea7 100644
--- a/src/renderer/hooks/MusicHook.ts
+++ b/src/renderer/hooks/MusicHook.ts
@@ -397,6 +397,8 @@ const setupMusicWatchers = () => {
 
 const setupAudioListeners = () => {
   let interval: any = null;
+  // 播放状态恢复定时器：当 interval 因异常被清除时，自动恢复
+  let recoveryTimer: any = null;
 
   const clearInterval = () => {
     if (interval) {
@@ -405,9 +407,91 @@ const setupAudioListeners = () => {
     }
   };
 
+  const stopRecovery = () => {
+    if (recoveryTimer) {
+      window.clearInterval(recoveryTimer);
+      recoveryTimer = null;
+    }
+  };
+
+  /**
+   * 启动进度更新 interval
+   * 从 audioService 实时获取 sound 引用，避免闭包中 sound.value 过期
+   */
+  const startProgressInterval = () => {
+    clearInterval();
+    interval = window.setInterval(() => {
+      try {
+        // 每次从 audioService 获取最新的 sound 引用，而不是依赖闭包中的 sound.value
+        const currentSound = audioService.getCurrentSound();
+        if (!currentSound) {
+          // sound 暂时为空（可能在切歌/重建中），不清除 interval，等待恢复
+          return;
+        }
+
+        if (typeof currentSound.seek !== 'function') {
+          // seek 方法不可用，跳过本次更新，不清除 interval
+          return;
+        }
+
+        const currentTime = currentSound.seek() as number;
+        if (typeof currentTime !== 'number' || Number.isNaN(currentTime)) {
+          // 无效时间，跳过本次更新
+          return;
+        }
+
+        // 同步 sound.value 引用（确保外部也能拿到最新的）
+        if (sound.value !== currentSound) {
+          sound.value = currentSound;
+        }
+
+        nowTime.value = currentTime;
+        allTime.value = currentSound.duration() as number;
+        const newIndex = getLrcIndex(nowTime.value);
+        if (newIndex !== nowIndex.value) {
+          nowIndex.value = newIndex;
+          if (isElectron && isLyricWindowOpen.value) {
+            sendLyricToWin();
+          }
+        }
+        if (isElectron && isLyricWindowOpen.value) {
+          sendLyricToWin();
+        }
+      } catch (error) {
+        console.error('进度更新 interval 出错:', error);
+        // 出错时不清除 interval，让下一次 tick 继续尝试
+      }
+    }, 50);
+  };
+
+  /**
+   * 启动播放状态恢复监控
+   * 每 500ms 检查一次：如果 store 认为在播放但 interval 已丢失，则恢复
+   */
+  const startRecoveryMonitor = () => {
+    stopRecovery();
+    recoveryTimer = window.setInterval(() => {
+      try {
+        const store = getPlayerStore();
+        if (store.play && !interval) {
+          const currentSound = audioService.getCurrentSound();
+          if (currentSound && currentSound.playing()) {
+            console.warn('[MusicHook] 检测到播放中但 interval 丢失，自动恢复');
+            startProgressInterval();
+          }
+        }
+      } catch {
+        // 静默忽略
+      }
+    }, 500);
+  };
+
   // 清理所有事件监听器
   audioService.clearAllListeners();
 
+  // 启动恢复监控
+  startRecoveryMonitor();
+
   // 监听seek开始事件，立即更新UI
   audioService.on('seek_start', (time) => {
     // 直接更新显示位置，不检查拖动状态
@@ -417,7 +501,7 @@ const setupAudioListeners = () => {
   // 监听seek完成事件
   audioService.on('seek', () => {
     try {
-      const currentSound = sound.value;
+      const currentSound = audioService.getCurrentSound();
       if (currentSound) {
         // 立即更新显示时间，不进行任何检查
         const currentTime = currentSound.seek() as number;
@@ -465,49 +549,8 @@ const setupAudioListeners = () => {
     if (isElectron) {
       window.api.sendSong(cloneDeep(getPlayerStore().playMusic));
     }
-    clearInterval();
-    interval = window.setInterval(() => {
-      try {
-        const currentSound = sound.value;
-        if (!currentSound) {
-          console.error('Invalid sound object: sound is null or undefined');
-          clearInterval();
-          return;
-        }
-
-        // 确保 seek 方法存在且可调用
-        if (typeof currentSound.seek !== 'function') {
-          console.error('Invalid sound object: seek function not available');
-          clearInterval();
-          return;
-        }
-
-        const currentTime = currentSound.seek() as number;
-        if (typeof currentTime !== 'number' || Number.isNaN(currentTime)) {
-          console.error('Invalid current time:', currentTime);
-          clearInterval();
-          return;
-        }
-
-        nowTime.value = currentTime;
-        allTime.value = currentSound.duration() as number;
-        const newIndex = getLrcIndex(nowTime.value);
-        if (newIndex !== nowIndex.value) {
-          nowIndex.value = newIndex;
-          // 注意：我们不在这里设置 currentLrcProgress 为 0
-          // 因为这会与全局进度更新冲突
-          if (isElectron && isLyricWindowOpen.value) {
-            sendLyricToWin();
-          }
-        }
-        if (isElectron && isLyricWindowOpen.value) {
-          sendLyricToWin();
-        }
-      } catch (error) {
-        console.error('Error in interval:', error);
-        clearInterval();
-      }
-    }, 50);
+    // 启动进度更新
+    startProgressInterval();
   });
 
   // 监听暂停
@@ -520,14 +563,16 @@ const setupAudioListeners = () => {
     }
   });
 
-  const replayMusic = async () => {
+  const replayMusic = async (retryCount: number = 0) => {
+    const MAX_REPLAY_RETRIES = 3;
     try {
       // 如果当前有音频实例，先停止并销毁
-      if (sound.value) {
-        sound.value.stop();
-        sound.value.unload();
-        sound.value = null;
+      const currentSound = audioService.getCurrentSound();
+      if (currentSound) {
+        currentSound.stop();
+        currentSound.unload();
       }
+      sound.value = null;
 
       // 重新播放当前歌曲
       if (getPlayerStore().playMusicUrl && playMusic.value) {
@@ -535,12 +580,18 @@ const setupAudioListeners = () => {
         sound.value = newSound as Howl;
         setupAudioListeners();
       } else {
-        console.error('No music URL or playMusic data available');
+        console.error('单曲循环：无可用 URL 或歌曲数据');
         getPlayerStore().nextPlay();
       }
     } catch (error) {
-      console.error('Error replaying song:', error);
-      getPlayerStore().nextPlay();
+      console.error('单曲循环重播失败:', error);
+      if (retryCount < MAX_REPLAY_RETRIES) {
+        console.log(`单曲循环重试 ${retryCount + 1}/${MAX_REPLAY_RETRIES}`);
+        setTimeout(() => replayMusic(retryCount + 1), 1000 * (retryCount + 1));
+      } else {
+        console.error('单曲循环重试次数用尽，切换下一首');
+        getPlayerStore().nextPlay();
+      }
     }
   };
 
@@ -551,9 +602,7 @@ const setupAudioListeners = () => {
 
     if (getPlayerStore().playMode === 1) {
       // 单曲循环模式
-      if (sound.value) {
-        replayMusic();
-      }
+      replayMusic();
     } else {
       // 顺序播放、列表循环、随机播放模式都使用统一的nextPlay方法
       getPlayerStore().nextPlay();
@@ -568,7 +617,10 @@ const setupAudioListeners = () => {
     getPlayerStore().nextPlay();
   });
 
-  return clearInterval;
+  return () => {
+    clearInterval();
+    stopRecovery();
+  };
 };
 
 export const play = () => {
diff --git a/src/renderer/hooks/usePlayerHooks.ts b/src/renderer/hooks/usePlayerHooks.ts
index d5e94bc..52dd73f 100644
--- a/src/renderer/hooks/usePlayerHooks.ts
+++ b/src/renderer/hooks/usePlayerHooks.ts
@@ -315,8 +315,11 @@ export const useSongDetail = () => {
     }
 
     if (playMusic.expiredAt && playMusic.expiredAt < Date.now()) {
-      console.info(`歌曲已过期，重新获取: ${playMusic.name}`);
-      playMusic.playMusicUrl = undefined;
+      // 本地音乐（local:// 协议）不会过期，跳过清除
+      if (!playMusic.playMusicUrl?.startsWith('local://')) {
+        console.info(`歌曲已过期，重新获取: ${playMusic.name}`);
+        playMusic.playMusicUrl = undefined;
+      }
     }
 
     try {
diff --git a/src/renderer/services/audioService.ts b/src/renderer/services/audioService.ts
index 90207b3..a35266e 100644
--- a/src/renderer/services/audioService.ts
+++ b/src/renderer/services/audioService.ts
@@ -513,66 +513,27 @@ class AudioService {
     seekTime: number = 0,
     existingSound?: Howl
   ): Promise<Howl> {
-    // 每次调用play方法时，尝试强制重置锁（注意：仅在页面刷新后的第一次播放时应用）
-    if (!this.currentSound) {
-      console.log('首次播放请求，强制重置操作锁');
-      this.forceResetOperationLock();
-    }
-
-    // 如果有操作锁，且不是同一个 track 的操作，则等待
-    if (this.operationLock) {
-      console.log('audioService: 操作锁激活中，等待...');
-      return Promise.reject(new Error('操作锁激活中'));
-    }
-
-    if (!this.setOperationLock()) {
-      console.log('audioService: 获取操作锁失败');
-      return Promise.reject(new Error('操作锁激活中'));
-    }
-
-    // 如果操作锁已激活，但持续时间超过安全阈值，强制重置
-    if (this.operationLock) {
-      const currentTime = Date.now();
-      const lockDuration = currentTime - this.operationLockStartTime;
-
-      if (lockDuration > 2000) {
-        console.warn(`操作锁已激活 ${lockDuration}ms，超过安全阈值，强制重置`);
-        this.forceResetOperationLock();
-      }
-    }
-
-    // 获取锁
-    if (!this.setOperationLock()) {
-      console.log('audioService: 操作锁激活，强制执行当前播放请求');
-
-      // 如果只是要继续播放当前音频，直接执行
-      if (this.currentSound && !url && !track) {
-        if (this.seekLock && this.seekDebounceTimer) {
-          clearTimeout(this.seekDebounceTimer);
-          this.seekLock = false;
-        }
-        this.currentSound.play();
-        return Promise.resolve(this.currentSound);
-      }
-
-      // 强制释放锁并继续执行
-      this.forceResetOperationLock();
-
-      // 这里不再返回错误，而是继续执行播放逻辑
-    }
-
-    // 如果没有提供新的 URL 和 track，且当前有音频实例，则继续播放
+    // 如果没有提供新的 URL 和 track，且当前有音频实例，则继续播放当前音频
     if (this.currentSound && !url && !track) {
-      // 如果有进行中的seek操作，等待其完成
       if (this.seekLock && this.seekDebounceTimer) {
         clearTimeout(this.seekDebounceTimer);
         this.seekLock = false;
       }
       this.currentSound.play();
-      this.releaseOperationLock();
       return Promise.resolve(this.currentSound);
     }
 
+    // 新播放请求：强制重置旧锁，确保不会被遗留锁阻塞
+    this.forceResetOperationLock();
+
+    // 获取操作锁
+    if (!this.setOperationLock()) {
+      // 理论上不会到这里（刚刚 forceReset 过），但作为防御性编程
+      console.warn('audioService: 获取操作锁失败，强制继续');
+      this.forceResetOperationLock();
+      this.setOperationLock();
+    }
+
     // 如果没有提供必要的参数，返回错误
     if (!url || !track) {
       this.releaseOperationLock();
@@ -649,11 +610,6 @@ class AudioService {
             this.currentTrack = track;
           }
 
-          // 如果不是热切换，立即更新 currentTrack
-          if (!isHotSwap) {
-            this.currentTrack = track;
-          }
-
           let newSound: Howl;
 
           if (existingSound) {
@@ -1061,6 +1017,8 @@ class AudioService {
    * 验证音频图是否正确连接
    * 用于检测音频播放前的图状态
    */
+  // 检查音频图是否连接（调试用，保留供 EQ 诊断）
+  // @ts-ignore 保留供调试使用
   private isAudioGraphConnected(): boolean {
     if (!this.context || !this.gainNode || !this.source) {
       return false;
@@ -1150,18 +1108,14 @@ class AudioService {
     if (!this.currentSound) return false;
 
     try {
-      // 综合判断:
-      // 1. Howler API是否报告正在播放
-      // 2. 是否不在加载状态
-      // 3. 确保音频上下文状态正常
-      // 4. 确保音频图正确连接（在 Electron 环境中）
+      // 核心判断：Howler API 是否报告正在播放 + 音频上下文是否正常
+      // 注意：不再检查 isAudioGraphConnected()，因为 EQ 重建期间
+      // source/gainNode 会暂时为 null，导致误判为未播放
       const isPlaying = this.currentSound.playing();
       const isLoading = this.isLoading();
       const contextRunning = Howler.ctx && Howler.ctx.state === 'running';
-      const graphConnected = isElectron ? this.isAudioGraphConnected() : true;
 
-      // 只有在所有条件都满足时才认为是真正在播放
-      return isPlaying && !isLoading && contextRunning && graphConnected;
+      return isPlaying && !isLoading && contextRunning;
     } catch (error) {
       console.error('检查播放状态出错:', error);
       return false;
diff --git a/src/renderer/services/preloadService.ts b/src/renderer/services/preloadService.ts
index c532895..4e1630a 100644
--- a/src/renderer/services/preloadService.ts
+++ b/src/renderer/services/preloadService.ts
@@ -64,12 +64,29 @@ class PreloadService {
     const duration = sound.duration();
     const expectedDuration = (song.dt || 0) / 1000;
 
-    // 时长差异只记录警告，不自动触发重新解析
-    // 用户可以通过 ReparsePopover 手动选择正确的音源
-    if (expectedDuration > 0 && Math.abs(duration - expectedDuration) > 5) {
-      console.warn(
-        `[PreloadService] 时长差异警告：实际 ${duration.toFixed(1)}s, 预期 ${expectedDuration.toFixed(1)}s (${song.name})`
-      );
+    if (expectedDuration > 0 && duration > 0) {
+      const durationDiff = Math.abs(duration - expectedDuration);
+      // 如果实际时长远小于预期（可能是试听版），记录警告
+      if (duration < expectedDuration * 0.5 && durationDiff > 10) {
+        console.warn(
+          `[PreloadService] 时长严重不足：实际 ${duration.toFixed(1)}s, 预期 ${expectedDuration.toFixed(1)}s (${song.name})，可能是试听版`
+        );
+        // 通过自定义事件通知上层，可用于后续自动切换音源
+        window.dispatchEvent(
+          new CustomEvent('audio-duration-mismatch', {
+            detail: {
+              songId: song.id,
+              songName: song.name,
+              actualDuration: duration,
+              expectedDuration
+            }
+          })
+        );
+      } else if (durationDiff > 5) {
+        console.warn(
+          `[PreloadService] 时长差异警告：实际 ${duration.toFixed(1)}s, 预期 ${expectedDuration.toFixed(1)}s (${song.name})`
+        );
+      }
     }
 
     return sound;
diff --git a/src/renderer/store/modules/playerCore.ts b/src/renderer/store/modules/playerCore.ts
index 6e3f30b..aa63692 100644
--- a/src/renderer/store/modules/playerCore.ts
+++ b/src/renderer/store/modules/playerCore.ts
@@ -110,8 +110,9 @@ export const usePlayerCoreStore = defineStore(
 
     /**
      * 播放状态检测
+     * 在播放开始后延迟检查音频是否真正在播放，防止无声播放
      */
-    const checkPlaybackState = (song: SongResult, requestId?: string, timeout: number = 4000) => {
+    const checkPlaybackState = (song: SongResult, requestId?: string, timeout: number = 6000) => {
       if (checkPlayTime) {
         clearTimeout(checkPlayTime);
       }
@@ -125,6 +126,10 @@ export const usePlayerCoreStore = defineStore(
         console.log(`[${actualRequestId}] 播放事件触发，歌曲成功开始播放`);
         audioService.off('play', onPlayHandler);
         audioService.off('playerror', onPlayErrorHandler);
+        if (checkPlayTime) {
+          clearTimeout(checkPlayTime);
+          checkPlayTime = null;
+        }
       };
 
       const onPlayErrorHandler = async () => {
@@ -140,7 +145,10 @@ export const usePlayerCoreStore = defineStore(
 
         if (userPlayIntent.value && play.value) {
           console.log('播放失败，尝试刷新URL并重新播放');
-          playMusic.value.playMusicUrl = undefined;
+          // 本地音乐不需要刷新 URL
+          if (!playMusic.value.playMusicUrl?.startsWith('local://')) {
+            playMusic.value.playMusicUrl = undefined;
+          }
           const refreshedSong = { ...song, isFirstPlay: true };
           await handlePlayMusic(refreshedSong, true);
         }
@@ -158,16 +166,46 @@ export const usePlayerCoreStore = defineStore(
           return;
         }
 
+        // 双重确认：Howler 报告未播放 + 用户仍想播放
+        // 额外检查底层 HTMLAudioElement 的状态，避免 EQ 重建期间的误判
+        const currentSound = audioService.getCurrentSound();
+        let htmlPlaying = false;
+        if (currentSound) {
+          try {
+            const sounds = (currentSound as any)._sounds as any[];
+            if (sounds?.[0]?._node instanceof HTMLMediaElement) {
+              const node = sounds[0]._node as HTMLMediaElement;
+              htmlPlaying = !node.paused && !node.ended && node.readyState > 2;
+            }
+          } catch {
+            // 静默忽略
+          }
+        }
+
+        if (htmlPlaying) {
+          // 底层 HTMLAudioElement 实际在播放，不需要重试
+          console.log('底层音频元素正在播放，跳过超时重试');
+          audioService.off('play', onPlayHandler);
+          audioService.off('playerror', onPlayErrorHandler);
+          return;
+        }
+
         if (!audioService.isActuallyPlaying() && userPlayIntent.value && play.value) {
           console.log(`${timeout}ms后歌曲未真正播放且用户仍希望播放，尝试重新获取URL`);
           audioService.off('play', onPlayHandler);
           audioService.off('playerror', onPlayErrorHandler);
 
-          playMusic.value.playMusicUrl = undefined;
+          // 本地音乐不需要刷新 URL
+          if (!playMusic.value.playMusicUrl?.startsWith('local://')) {
+            playMusic.value.playMusicUrl = undefined;
+          }
           (async () => {
             const refreshedSong = { ...song, isFirstPlay: true };
             await handlePlayMusic(refreshedSong, true);
           })();
+        } else {
+          audioService.off('play', onPlayHandler);
+          audioService.off('playerror', onPlayErrorHandler);
         }
       }, timeout);
     };
@@ -418,11 +456,10 @@ export const usePlayerCoreStore = defineStore(
         return newSound;
       } catch (error) {
         console.error('播放音频失败:', error);
-        setPlayMusic(false);
 
         const errorMsg = error instanceof Error ? error.message : String(error);
 
-        // 操作锁错误处理
+        // 操作锁错误不应该停止播放状态，只需要重试
         if (errorMsg.includes('操作锁激活')) {
           console.log('由于操作锁正在使用，将在1000ms后重试');
 
@@ -442,14 +479,17 @@ export const usePlayerCoreStore = defineStore(
             if (userPlayIntent.value && play.value) {
               playAudio(requestId).catch((e) => {
                 console.error('重试播放失败:', e);
+                setPlayMusic(false);
               });
             }
           }, 1000);
         } else {
+          // 非操作锁错误，停止播放并通知用户
+          setPlayMusic(false);
           console.warn('播放音频失败（非操作锁错误），由调用方处理重试');
+          message.error(i18n.global.t('player.playFailed'));
         }
 
-        message.error(i18n.global.t('player.playFailed'));
         return null;
       }
     };
@@ -556,8 +596,15 @@ export const usePlayerCoreStore = defineStore(
           console.log('恢复上次播放的音乐:', playMusic.value.name);
           const isPlaying = settingStore.setData.autoPlay;
 
+          // 本地音乐（local:// 协议）不需要重新获取 URL，保留原始路径
+          const isLocalMusic = playMusic.value.playMusicUrl?.startsWith('local://');
+
           await handlePlayMusic(
-            { ...playMusic.value, isFirstPlay: true, playMusicUrl: undefined },
+            {
+              ...playMusic.value,
+              isFirstPlay: true,
+              playMusicUrl: isLocalMusic ? playMusic.value.playMusicUrl : undefined
+            },
             isPlaying
           );
         } catch (error) {
diff --git a/src/renderer/store/modules/playlist.ts b/src/renderer/store/modules/playlist.ts
index 7805d30..cea300c 100644
--- a/src/renderer/store/modules/playlist.ts
+++ b/src/renderer/store/modules/playlist.ts
@@ -563,9 +563,12 @@ export const usePlaylistStore = defineStore(
 
         // 检查URL是否已过期
         if (song.expiredAt && song.expiredAt < Date.now()) {
-          console.info(`歌曲URL已过期，重新获取: ${song.name}`);
-          song.playMusicUrl = undefined;
-          song.expiredAt = undefined;
+          // 本地音乐（local:// 协议）不会过期
+          if (!song.playMusicUrl?.startsWith('local://')) {
+            console.info(`歌曲URL已过期，重新获取: ${song.name}`);
+            song.playMusicUrl = undefined;
+            song.expiredAt = undefined;
+          }
         }
 
         // 如果是当前正在播放的音乐，则切换播放/暂停状态